The Carfax Vehicle History Report is the company's core product. Users purchase either
a single report or create an account for building multiple reports for different
vehicles, allowing consumers to utilize Carfax over a period of time as
they search for a vehicle. Additionally, buyers can request Carfax reports free-of-charge
from auto dealers, and some automakers routinely provide Carfax reports
as part of their pre-owned vehicle programs. Online retailers such as Overstock.com
and Auctions International have integrated Carfax reports into their
websites.

Carfax reports provide different types of information. For
example, reports might indicate if a car was ever titled as salvage, was flood-damaged,
was reconstructed or rebuilt, or had its odometer rolled back. To use
the service, buyers enter the Vehicle Identification Number (VIN) for a car or
light truck into the Carfax website. The service will not work for any vehicle
that has a VIN of less or more than 17 digits, which includes vehicles older than
1981. Reports are broken down into nine categories: report summary, vehicle
specifications, lemon check, accident check, mileage accuracy check, ownership
check, recall check, warranty check and vehicle history. Carfax guarantees customer
satisfaction; however, buyers should be aware that while Carfax offers perhaps
the most comprehensive data on used vehicles available, the company
recommends its reports be used in conjunction with inspections by certified mechanics.